bumped version to 2.2.2

fixed setup version check for v4 extra compilation args (sirfz#53)

version 2.2.0

bumped version to 2.1.3

- Avoid crash for unexpected cflags returned by pkg-config (sirfz#14)

- Added note in README regarding multiple tesseract installations (sirfz#9)

bumped version to 2.1.1